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go-wfs-client

This package provides a POC client to the WFS-3 spec: https://rawgit.com/opengeospatial/WFS_FES/master/docs/17-069.html

Dependencies

Listed in vendor/vendor.json. Use govendor sync or your favorite other means of getting the dependencies.

NOTE: This effort was done with go-1.10 - it's not clear what the minimum requirement is at this time.

Approach

The client provides a way to connect to a WFS-3 service defined by a single root URL. When connecting, a request to the /api path is made to obtain the OpenAPI specification. The specification paths and operation IDs are used to guide discovery. Operation parameters are adhered to as well but at the moment there is only support for 'path' parameters.

NOTE: There is support in the client for the current path guidance (as of 03-08-2018) and the newer proposal arrived at during the recent hackathon. The CLI currently does not support switching between the two and uses the older layout (where collectionInfo is at the root URL). See: wfs/paths.go.

NOTE: If the specification does not parse correctly the first time, the core WFS-3 'Components' section of an OpenAPI spec is 'patched' in to the original definition and a 2nd attempt at parsing is made.

API/Spec Verification

The intention of this effort was to include a means of validation and verification. This currently only validates the OpenAPI specification using a 3rd party library and does not contain WFS-3 specific checks.

Driving

A simple CLI is provided as a driver for the client.

NOTE: The CLI uses a HTTP disk cache that, by default, will be created in $TMP/wfs-http-cache

Examples:

Print out service summary (text):

go run cmd/cli/main.go info <URL>

Print out collections metadata (raw response):

go run cmd/cli/main.go coll <URL>

Invoke a simple operation (prints raw response):

go run cmd/cli/main.go op <URL> <OPERATION>

Invoke an operation with parameter (prints raw response):

go run cmd/cli/main.go op <URL> <OPERATION> <PARAM>=<VALUE>

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